Carrillo BCR1220-025 Bullet Series Forged Piston Set SBC 419 4.150 Bore +0.025

The CP-Carrillo BCR1220-025 is a Bullet Series forged aluminum piston set designed for Small Block Chevy (SBC) 419 cubic inch engines. Featuring a 4.150-inch bore (+0.025" oversize), 3.875-inch stroke, and 6.000-inch rod length, these pistons are engineered specifically to fit the Brodix Spec cylinder head used across USMTS, USRA, UMP, and Wissotta racing series.

Manufactured in the USA from 2618 aluminum forgings, the BCR1220-025 delivers the strength and durability required for competitive circle track racing under naturally aspirated conditions. Each piston features an 8.0cc dome with a 1.062-inch compression height and an advertised weight of 445 grams.

Key Features:

• Bore: 4.150 in. (105.410mm) — +0.025" oversize
• Stroke: 3.875 in.
• Rod Length: 6.000 in.
• Compression Height: 1.062 in.
• Dome Volume: 8.0cc dome with two valve reliefs
• Advertised Weight: 445 grams per piston
• Manufactured from 2618 forged aluminum for superior strength
• Includes 1.2mm gas nitride steel top ring, 1.2mm Napier second ring, and 3.0mm oil ring
• .927 x 2.500 chromoly wrist pins with .180 wall standard and wire locks
• Dual forced pin oilers for enhanced lubrication
• Contact reduction grooves and accumulator groove
• Vertical gas ports and .335-deep intake pockets
• Pistons balanced to ±1 gram for precision engine assembly
• FEA (Finite Element Analysis) designed forging
• ISO 9000 certified manufacturing

The Bullet Series was developed to bring race-proven CP-Carrillo manufacturing processes to an accessible price point, using the same production methods as the full CP Pistons lineup. Designed for normally aspirated applications, these pistons are a trusted choice for dirt track and oval racing competitors who demand consistent, reliable performance.